这个英语句子有没语法错误
问题描述：
这个英语句子有没语法错误
It is a complicated process that was divided into three steps:eraporation,condensation and precipitation and which maintains the ecological balances.
这个定语从句有错误没?有的话,怎样修改!
答
was 改成 is
因为that和which引导的两个定语从句都是用来修饰 a complicated process 的,而且二者是并列关系,which用的是第三人称单数,所以that也应用第三人称单数.另外一个复杂的过程分成三步,它是一个事实,不是说过去别分为三步,与时态无关,从这个意义上讲也应该将 was 改成 is